Update GUC setting to not crash with ASAN (citusdata#8301)

The GUC configuration for SkipAdvisoryLockPermissionChecks had
misconfigured the settings for GUC_SUPERUSER_ONLY for PGC_SUSET - when
PostgreSQL running with ASAN, this fails when querying pg_settings due
to exceeding the size of the array GucContext_Names. Fix up this GUC
declaration to not crash with ASAN.

(cherry picked from commit 86010de)

Author: visridha

src/backend/distributed/shared_library_init.c

@@ -2493,8 +2493,8 @@ RegisterCitusConfigVariables(void)
 		NULL,
 		&SkipAdvisoryLockPermissionChecks,
 		false,
-		GUC_SUPERUSER_ONLY,
-		GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE,
+		PGC_SUSET,
+		GUC_SUPERUSER_ONLY | GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE,
 		NULL, NULL, NULL);
 
 	DefineCustomBoolVariable(